The new wave of regionalism

The rapid growth of economic regionalism has stimulated a large and influen tial body of research. Many existing studies, however, place little emphasi s on the political conditions that shape regionalism. Lately, the drawbacks of such an approach have drawn heightened attention, contributing to a bur geoning literature that sheds new light on how political factors guide both the formation and economic effects of regional institutions. We argue that these analyses provide key insights into the political underpinnings of re gionalism. They also indicate that studies neglecting political conditions risk arriving at misleading conclusions about regionalism's causes and cons equences. At the same time, however, recent research leaves various key the oretical and empirical issues unresolved, including which political factors bear most heavily on regionalism and the nature of their effects.